Armature-core for electric motors



(No Model.)

a D. PEPPER, Jr.

ARMATURE GORE FOR ELECTRIC MOTORS. No. 473,077. PatentedApr. 19,1892.

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UNITED STATES PATENT OFFICE.

DAVID PEPPER, JR, OE PHILADELPHIA, PENNSYLVANIA.

ARMATURE-CORE FOR ELECTRIC MOTORS.

SPECIFICATION forming part of Letters Patent No. 473,077, dated April 19, 1892.

Application filed July 24, 1891.

To all whom it may concern.-

Be it known that I, DAVID PEPPER, J12, of the city and county of Philadelphia, State of Pennsylvania, have invented a certain new and useful Improved Armature-Core for Electric Motors or Dynamos, of which the following is an exact and true description,reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to the construction of the core on which wire is wound to form the armature of electric motors or dynamos, my object being to construct the core in sections, so that it can be conveniently wound by niachinery or supplied with coils wound by machinery, and to provide simple and efficient means for securing the sections of the ring together.

The nature of my invention will be best und-erstood as described in connection with the drawings, in which it is illustrated, and in which Figure 1 is a sectional side view of the armature-core, the spider or center holding it to the shaft, and some coils of wire, the view being taken on the section-line 1 2 of Fig. 2. Fig. 2 is a central transverse section on the line 3 4 of Fig. 1; Fig. 3, a similar section on the line 5 6 of Fig. 1. Fig. 4% is a perspective View of one of the thin iron plates used preferably in forming my armature-core; and Fig.. 5 is a perspective view of the armature-core, showing a modification of the devices for holding the two sections together.

A is the shaft, to which the armature is so cured.

B is the armature support or spider by which the armature-core is held to the shaft.

0 is the armature-core itself; D D, coils of wire in place upon the core.

The armature-core, as shown, is made up of two semi-annular sections, the ends of each section being formed with a projection o and a recess o,inclosed within said projection,the projections and recesses at the two ends of each section lying parallel with each other, so that another section similarly formed will interlock with it, as shown in Fig. 5. The sections thus adjusted with respect to each other to form a single continuous ring are prevented Serial No. 400,540. (No model.)

from separating by an interlocking device, which will so engage the sections that they cannot independently move to or from their common center. This interlocking of the sections is preferably attained by means of the center or spider, to which the ring is secured, the arms of which will so engage the core as to prevent independent movement of its sections,or the parts maybe interlocked by means of a simple pin, as E, Fig. 5, passing through a perforation, as o 0 formed in the abutting edges of the two sections.

Preferably the armature-core or the sections thereof are made up of a series of thin iron plates, as C. These plates, being all stamped in the same die to the form indicated, are secured together in any convenient way to form each section of the core. The wire coils may be wound upon the core-sections, but preferably are wound by machinery and slipped on the sections, being connected together and with the commutator in any usual and convenient manner.

The armature center or spider B is preferably made up, as shown in the drawings, by two parts B and B having arms I) and 11 which extend to and rest against the inner face of the core, one pair of arms preferably resting in a slot 0 0 formed at the junction of the abutting edges of the two sections and effectually locking them together. Arms 1) b extend up alongside of the core at each side. The part B rests against the shoulder a of the shaft and the part B rests against a nut a, which screws upon the shaft and which clamps the core between the parts of the spider and against the shoulder a.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. An armature-core for electric motors or dynamos, formed of sections having at their ends tongues c and inclosed recesses c, adapted to fit together, as described, in combination with an interlocking device arranged, as described, to prevent independent movements of the sections when united to or from their common center.

2. An armature-core for electric motors or dynamos, formed of sections having at their ends tongues c' and inclosed recesses c,a(1apttongues c and inciosed recesses c, witha spied to fit together, as described, in combination der B, having arms, as b arranged. to grasp [O with an armature-center secured to the core, and center the interlocked sections. as desoribechand so that the core-sections are r 5 locked by it against independent movement DAVID-PEPPER from or to the center. Witnesses:

3. The combination of an armature-core 1 LISLE STOKES, made up ofsections having at their ends JOSHUA MATLACK, Jr. 

